And the most useless is bullet chess . You are becoming worse player by playing it , you don't learn much, plus it's useless in real world against other people from a practical point. Also professionals don't play bullet, there's no bullet world championship like rapid or blitz.
Bullet only for fun if you have the time and energy and even then it's better to play blitz.
We leave in a reality of present life, where time is money and everything is speeding up like it or not.
So unless you are a professional, blitz is the way to go from a practical point.
An everyday life you most likely need speed skills to play chess , friend, stranger,chess hustler no one wants or they simply cant afford to play 1 hour game , most likely it will be under 20 minutes quick game.
So blitz is they way to go,plus if you are good at blitz you Wil be good enough in rapid.